Acknowledgments This work has been supported by the regional Government of Aragón (Spain, Project PI119/09, and E101 and T87 Research Groups funding) and the Spanish Government and Feder funds through grant MAT2010-19837-C06-06. This work has been funded in part by the European Commission through projects LIFE11/ENV/ES 560 and grant agreement no. 280658. The authors would like to acknowledge the use of Servicio de Microscopia Electrónica (Servicios de Apoyo a la Investigación), MI-503 Universidad de Zaragoza. The authors also thank the technical assistance provided by the Servicio de Análisis of the

Instituto de Carboquímica ICB-CSIC. The authors thank María Jesús Lázaro for kindly providing carbon xerogel and ordered mesoporous carbon samples. Cyclosporin A in vitro Carbon black and activated carbon samples were kindly supplied by Delta Tecnic S.A. and Morgui Clima S.L, respectively. References 1. Muñoz E, Maser WK, Benito AM, Martínez MT, de la Fuente GF, Righi A, Sauvajol JL, Anglaret E, Maniette Y: Single-walled carbon nanotubes produced by cw CO 2 -laser ablation: study of parameters important for their formation. Appl Phys A 2000, 70:145–151.CrossRef 2. Puretzky AA, Styers-Barnett DJ, Rouleau CM, Hu H, Zhao

B, Ivanov IN, Geohegan DB: Cumulative and continuous laser vaporization synthesis of single wall carbon nanotubes and nanohorns. Appl Phys A 2008, 93:849–855.CrossRef 3. Rode AV, Hyde ST, AZD1480 price Gamaly EG, Elliman RG, McKenzie DR, Bulcock S: Structural analysis of a carbon foam formed by high pulse-rate laser Resveratrol ablation. Appl Phys A 1999,

69:S755-S758.CrossRef 4. Choi M, Altman IS, Kim YJ, Pikhitsa PV, Lee S, Park GS, Jeong T, Yoo JB: Formation of shell-shaped carbon nanoparticles above a critical laser power in irradiated acetylene. Adv Mater 2004, 16:1721–1725.CrossRef 5. Muñoz E, de Val M, Ruiz-González ML, López-Gascón C, Sanjuán ML, Martínez MT, González-Calbet JM, de la Fuente GF, Laguna M: Gold/carbon nanocomposite foam. Chem Phys Lett 2006, 420:86–89.CrossRef 6. Muñoz E, Ruiz-González ML, Seral-Ascaso A, Sanjuán ML, González-Calbet JM, Laguna M, de la Fuente GF: Tailored production of nanostructured metal/carbon foam by laser ablation of selected organometallic precursors. Carbon 2010, 48:1807–1814.CrossRef 7. Razal JM, Gilmore KJ, Wallace GG: Carbon nanotube biofiber formation in a polymer-free coagulation bath. Adv Funct Mater 2008, 18:61–66.CrossRef 8. Ferrari AC, Robertson J: Interpretation of Raman spectra of disordered and amorphous carbon. Phys Rev B 2000, 61:14095–14107.CrossRef 9. Gaan S, Sun G: Effect of phosphorus and nitrogen on flame retardant cellulose: a study of phosphorus compounds. J Anal Appl Pyrolysis 2007, 78:371–377.CrossRef 10. Wu D, Fu R, Zhang S, Dresselhaus MS, Dresselhaus G: Preparation of low-density carbon aerogels by ambient pressure drying. Carbon 2004, 42:2033–2039.CrossRef 11.